// https://chat3d.oss-cn-beijing.aliyuncs.com/bg_main.png
page {
    width: 100vw;
    height: 100vh;
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background: url('https://chat3d.oss-cn-beijing.aliyuncs.com/bg_main.png');
    color: #fff;
}

page:before {
    content: "";
    position: fixed;
    z-index: -1;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background-image: inherit;
    -webkit-background-size: cover !important;
    -o-background-size: cover;
    background-size: cover !important;
}

.displaycenter {
    display: flex;
    justify-content: center;
    align-items: center;
}

// .kong {
//     height: 178rpx;
// }